I know that it is a steep learning curve. Do you really need a backup to restore this tuner setup? As with all tuner setups, the vital thing is that the config must match hardware.
@Stu5,please confirm that
A. You know which cable is which and that you have labelled them.
B. For the 28.2 tuner, you have set this to simple, single 28.2
C. For the tuner with coax coming from the diseqc switch, you have it set as per post 27.